How many moles are in 1.50 x 1023 molecules NH3?
A. 2.49 x 10 -1 mol NH3
B. 2.49 x 101 mol NH3
C. 2.65 x 10 -1 mol NH3
D. 2.78 x 10 1 mol NH3
maybe B
I don't think so. There are 6.02E23 things in a mole of things.
yes.
To determine the number of moles in a given number of molecules, you need to use Avogadro's number, which states that one mole of any substance contains 6.022 x 10^23 particles (atoms, molecules, etc.).
In this case, you have 1.50 x 10^23 molecules of NH3. Therefore, to find the number of moles, you divide the number of molecules by Avogadro's number.
1.50 x 10^23 molecules NH3 / (6.022 x 10^23 molecules/mol) = 0.249 moles NH3
So, the answer is option A: 2.49 x 10^(-1) mol NH3.